diff --git a/extension/README.md b/extension/README.md
index 0961173..9cedf60 100644
--- a/extension/README.md
+++ b/extension/README.md
@@ -1,5 +1,8 @@
 - manifest version: both chrome and firefox store versions are on manifest v3 now
 
+# Icon
+Icon is from https://www.freepik.com/icon/unicorn_14284894, scaled a bit up with `convert unicorn.png  -resize 110% -gravity center -background none -extent 128x128 unicorn2.png`
+
 # permissions used
 See main `README.md`.
 
diff --git a/extension/generate_manifest.js b/extension/generate_manifest.js
index 697123a..eb5ec04 100644
--- a/extension/generate_manifest.js
+++ b/extension/generate_manifest.js
@@ -109,12 +109,6 @@ export function generateManifest({
         content_scripts.push({"matches": ["<all_urls>"], "js": ["selenium_bridge.js"]})
     }
 
-    // FIXME ugh...
-    // this will basically require "Reads data on all sites" permission
-    // and seems like all other methods for detecting it (e.g. listener on popup page/offscreen page don't work reliably)
-    // https://stackoverflow.com/a/77806811/706389/
-    content_scripts.push({"matches": ["<all_urls>"], "js": ["detect_dark_mode.js"]})
-
     const manifest = {
         name: pkg.name + (release ? '' : ' [dev]'),
         version: pkg.version,
diff --git a/extension/rollup.config.js b/extension/rollup.config.js
index dcdeda3..75195fa 100644
--- a/extension/rollup.config.js
+++ b/extension/rollup.config.js
@@ -113,6 +113,5 @@ export default [
         path.join(srcDir, 'background.ts'),
         path.join(srcDir, 'options_page.ts'),
         path.join(srcDir, 'popup.ts'),
-        path.join(srcDir, 'detect_dark_mode.ts'),
     ]),
 ]
diff --git a/extension/src/background.ts b/extension/src/background.ts
index 6d379da..a167ccf 100644
--- a/extension/src/background.ts
+++ b/extension/src/background.ts
@@ -186,13 +186,6 @@ browser.runtime.onMessage.addListener((_message: unknown, sender: Runtime.Messag
         })
         return true  // means 'async response'
     }
-    if (message.method == 'DARK_MODE') {
-        const icon_path = message.hasDarkMode ? 'img/unicorn_dark.png' : 'img/unicorn.png'
-
-        // manifest v2 doesn't have browser.action
-        const action = browser.action ? browser.action : browser.browserAction
-        action.setIcon({path: icon_path})
-    }
 })
 
 
diff --git a/extension/src/detect_dark_mode.ts b/extension/src/detect_dark_mode.ts
deleted file mode 100644
index ee8642c..0000000
--- a/extension/src/detect_dark_mode.ts
+++ /dev/null
@@ -1,10 +0,0 @@
-const hasDarkMode = window.matchMedia('(prefers-color-scheme: dark)').matches
-
-// TODO this won't be typechecked though.. maybe need to make it TS aware only?
-// or maybe fine to import browser here, just remove unused stuff to keep content script small?
-
-// @ts-expect-error browser should be available in browser context
-chrome.runtime.sendMessage({
-    method: 'DARK_MODE',
-    hasDarkMode: hasDarkMode,
-})
diff --git a/extension/src/img/unicorn.png b/extension/src/img/unicorn.png
index 1e97bbc..2cf807e 100644
Binary files a/extension/src/img/unicorn.png and b/extension/src/img/unicorn.png differ
diff --git a/extension/src/img/unicorn_dark.png b/extension/src/img/unicorn_dark.png
deleted file mode 100644
index 3ec03a9..0000000
Binary files a/extension/src/img/unicorn_dark.png and /dev/null differ